Sotheby’s is selling the first posted envelope to use a prepaid adhesive stamp at a New York auction in February focused on singular, rare works from the 13th century to today. The combined Mulready ...
The envelope was sent twice: once on May 2, 1840, and again on May 4, 1840. Sotheby's The first known piece of mail sent with a prepaid, adhesive stamp could sell for as much as $2.5 million.
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